[ 28.620495] BUG: Bad rss-counter state mm:000000005a7300a0 type:MM_FILEPAGES val:33 [ 28.623078] BUG: Bad rss-counter state mm:000000005a7300a0 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.794855] ================================================================== [ 28.795828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.796818] Read of size 8 at addr ffff88800c4e8880 by task sshd/219 [ 28.797756] [ 28.797990] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.798911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.799956] Call Trace: [ 28.800290] [ 28.800586] dump_stack_lvl+0x91/0xf0 [ 28.801101] print_report+0xcc/0x620 [ 28.801625] ? __virt_addr_valid+0x102/0x340 [ 28.802217] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.802865] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.803516] kasan_report+0xbe/0xf0 [ 28.804014] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.804672] vma_interval_tree_remove+0xc75/0xec0 [ 28.805323] vma_prepare+0xc54/0x11a0 [ 28.805839] __split_vma+0x5af/0x950 [ 28.806347] ? __pfx___split_vma+0x10/0x10 [ 28.806918] ? find_held_lock+0x2c/0x110 [ 28.807465] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.808066] ? lock_is_held_type+0x9f/0x120 [ 28.808636] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.809299] ? mtree_range_walk+0x632/0x900 [ 28.809883] ? mas_walk+0x5c7/0x7c0 [ 28.810383] do_vmi_munmap+0x1f1/0x2b0 [ 28.810910] mmap_region+0x1f9/0x2660 [ 28.811425] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.811969] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.812740] ? __pfx_lock_acquire+0x10/0x10 [ 28.813323] ? __pfx_mmap_region+0x10/0x10 [ 28.813895] ? security_mmap_addr+0x7d/0xa0 [ 28.814461] ? get_unmapped_area+0x1f5/0x3f0 [ 28.815045] do_mmap+0x854/0xf00 [ 28.815513] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.816038] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.816637] ksys_mmap_pgoff+0x3af/0x500 [ 28.817196] do_syscall_64+0x3f/0x90 [ 28.817712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.818396] RIP: 0033:0x7f06eb953d82 [ 28.818877] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 28.821113] RSP: 002b:00007ffe02f06028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.822083] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06eb953d82 [ 28.822975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06ead8d000 [ 28.823867] RBP: 00007f06ead8d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.824760] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e13a0deec0 [ 28.825661] R13: 00007ffe02f06040 R14: 00007ffe02f06070 R15: 00007ffe02f063d0 [ 28.826570] [ 28.826874] [ 28.827102] Allocated by task 212: [ 28.827552] kasan_save_stack+0x22/0x50 [ 28.828085] kasan_set_track+0x25/0x30 [ 28.828599] __kasan_slab_alloc+0x59/0x70 [ 28.829147] kmem_cache_alloc+0x16b/0x370 [ 28.829704] vm_area_dup+0x20/0x160 [ 28.830171] __split_vma+0x170/0x950 [ 28.830650] split_vma+0xc6/0x110 [ 28.831106] mprotect_fixup+0x8d2/0xb30 [ 28.831627] do_mprotect_pkey+0x87e/0xd40 [ 28.832167] __x64_sys_mprotect+0x78/0xc0 [ 28.832712] do_syscall_64+0x3f/0x90 [ 28.833207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.833877] [ 28.834102] Freed by task 212: [ 28.834510] kasan_save_stack+0x22/0x50 [ 28.835034] kasan_set_track+0x25/0x30 [ 28.835554] kasan_save_free_info+0x2b/0x50 [ 28.836109] __kasan_slab_free+0x10a/0x190 [ 28.836661] kmem_cache_free+0x10d/0x4d0 [ 28.837185] rcu_core+0x8c8/0x2860 [ 28.837644] __do_softirq+0x1b7/0x7d4 [ 28.838134] [ 28.838353] Last potentially related work creation: [ 28.838963] kasan_save_stack+0x22/0x50 [ 28.839482] __kasan_record_aux_stack+0x8e/0xa0 [ 28.840073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.840737] remove_vma+0x139/0x170 [ 28.841223] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.841804] do_vmi_munmap+0x1f1/0x2b0 [ 28.842313] __vm_munmap+0x138/0x3a0 [ 28.842803] __x64_sys_munmap+0x59/0x80 [ 28.843319] do_syscall_64+0x3f/0x90 [ 28.843812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.844474] [ 28.844693] The buggy address belongs to the object at ffff88800c4e8828 [ 28.844693] which belongs to the cache vm_area_struct of size 168 [ 28.846231] The buggy address is located 88 bytes inside of [ 28.846231] freed 168-byte region [ffff88800c4e8828, ffff88800c4e88d0) [ 28.847673] [ 28.847895] The buggy address belongs to the physical page: [ 28.848578] page:0000000044ed4475 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4e8 [ 28.849710] memcg:ffff88800dc1af01 [ 28.850146] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.850873] page_type: 0xffffffff() [ 28.851333] raw: 0100000000000200 ffff88800879fc80 ffffea000039cbc0 dead00000000000b [ 28.852281] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc1af01 [ 28.853227] page dumped because: kasan: bad access detected [ 28.853912] [ 28.854134] Memory state around the buggy address: [ 28.854724] ffff88800c4e8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.855600] ffff88800c4e8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.856492] >ffff88800c4e8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.857379] ^ [ 28.857804] ffff88800c4e8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.858694] ffff88800c4e8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.859577] ================================================================== [ 28.860634] Disabling lock debugging due to kernel taint [ 30.805509] BUG: Bad rss-counter state mm:00000000168b598b type:MM_FILEPAGES val:33 [ 30.807010] BUG: Bad rss-counter state mm:00000000168b598b type:MM_ANONPAGES val:22 [ 31.291674] BUG: Bad rss-counter state mm:00000000052cc6b9 type:MM_FILEPAGES val:33 [ 31.292646] BUG: Bad rss-counter state mm:00000000052cc6b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5987' (ECDSA) to the list of known hosts. 2023/06/19 13:06:57 fuzzer started 2023/06/19 13:06:58 dialing manager at localhost:44161 2023/06/19 13:06:58 checking machine... 2023/06/19 13:06:58 checking revisions... [ 32.074345] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:06:58 testing simple program... [ 32.119831] cgroup: Unknown subsys name 'net' [ 32.164937] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:06:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000034 RCX=dffffc0000000000 RDX=ffff888015e9b680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000035 RSP=ffff8880183077b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96c80 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0380 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc4eb44d900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fc4eba04618 CR3=000000001682c000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f863869f250 CR3=000000000ca58000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=325b20814eb8d693a24ff8bd241819e7 XMM02=2c67c8bc2e329bc3000000000011d928 XMM03=fb795ef6d657705600000000001243a8 XMM04=e06ee9a654251cc900000000000ae988 XMM05=dfcdbad4f1609c370000000000133f38 XMM06=3872733804ca48a80000000000133110 XMM07=e042d86d42eb936e0000000000124680 XMM08=0b5ab49870e023de000000000011d988 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000